Is my girlfriend pregnant?

It was 2 days ago when my gf came here and we fooled around. She gave me a bj then she touched the tip of my penis and told me there was something that she think came out. I put my penis back in my underwear then i told her that i'm just going to stick my penis on the outer vagina. I did stick it but did not put it in. Could she get pregnant? Please answer, I'm so paranoid

She's telling me her breasts and nipples are sore but I think it's because I played with her breasts and she's almost to her time of menstruation for this month.